Hoisting apparatus.



'PATENTED SEPT. 13, 1904.

0. W. HUNT. HOISTING APPARATUS.

APPLIOATIOR FILED NOV. 11, 1903.

N0 MODEL.

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UNITED STATES Patented September 13, 1904.

CHARLES W. HUNT, OF NEW YORK, N. Y.

HOISTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 769,902, dated September 13, 1904.

Application filed November 11, 1903. Serial No. 180,653. (No model.)

T0 at whom it may concern:

Be it known that I, CHARLEsWALLAoE HUNT, acitizen of the United States, residing in West New Brighton, in the borough of Richmond, of the city of New York, in the State of New York,have invented certain new and useful Improvements in Hoisting Apparatus, of which the following is a specification,reference being had to the accompanying drawings,forming a part hereof.

This invention relates to hoisting apparatus of the class in which the load is to receive a movement of translation horizontally as well as a movement up or down, and more especially apparatus of the character of that shown in LettersPatent of theUnited States No. 622, 366, dated April &, 1899. in said Letters Patent comprises two drums mounted upon a common shaft with an equalizing-gear inter-posed between and in operative engagement with the two drums, power being applieddirectly to one of the drums and indirectly when desired to the other of the two drums through a friction-clutch, while abrake is provided for the equalizing-gear and another for the second drum. The first drum is fast upon the shaft, and the equalizing-gear and second drum are loose upon the shaft.

The object of the present invention is particularly to improve upon an apparatus of the character shown in said Letters Patent and to simplify the construction and especially the control of such apparatus while providing for movement of the load in a manner particularly adapted for some uses. In accordance with the present invention the two drums are mounted loosely and the power is applied directly to the equalizing-gear, which is arranged to drive with both drums, while the control of the apparatus is effected by brakes applied to one or the other of the two drums. Furthermore, the boom-truck or trolley and the running or hook block are provided each with a multiple number of sheaves for each rope, so that in cooperation with the two drums arranged as above stated the load may be moved in either'direction at an angle with the boom determined by the number of parts of the rope sustaining the load.

The apparatus shown ing-block or to the truck.

The invention will be more fully described hereinafter with reference to the accompanying drawings, in which it is illustrated, and in which Figure 1 is a view in elevation, largely diagrammatic, of a hoisting apparatus which embodies the invention.- Fig. 2 is a view, partly in elevation and partly in longitudinal section, showing on a larger scale the hoistingdrums and their arrangement. Fig. 3 is a detail view showing the sheaves on the boomtruck and running or hook block and the arrangement of the rope.

The boom or track a may be arranged as usual and is adapted to permit the travel thereon of the boom-truclr or trolley b. It may also support the usual guide-sheaves c, c, and 0 over which the ropes (Z and 6 pass from the respective winding-drums f and g, the rope (Z passing over the sheave c and thence about the multiple sheaves b on the boom-truck and the multiple sheaves it and being finally secured to the running-block or to the truck. The rope 0 passes over the sheave c at the inner end of the boom and thence about the sheave c at the outer end of the boom and about the multiple sheaves b and [b2 on the boom-truck and running-block, respectively, being finally secured to the run- The sheaves Z2 and 72, are arranged similarly to the sheaves b and it, as shown in Fig. 3, and need not be separately illustrated. It will be observed that the sheaves 7t and [L2 are placed fore and aft relatively to each other in the runningblock, as well as the sheaves b and b in the boom-truck, thereby preventing the twisting of the loads in hoisting. The drums f and g are loosely mounted and may be conveniently, although not necessarily, supported upon a common shaft 2', which also carries fast thereto an equalizing-gearic of ordinary construction, this arrangement affording a convenient means of applying the power to the equalizinggear from a motor Z or driving means of any character through gears m and n of ordinary description. There is also provided a brake 0 of ordinary construction for the equalizing-gear, acting through the shaft or directly upon the gear, as shown, and the drums f and g are provided severally with brakes f and 9', also of ordinary description.

In the arrangement shown in the drawings there are provided on the boom-truck for each rope four sheaves and on the running-block three sheaves, so that there are seven parts to each rope to support the load. The sheaves are grouped and arranged as shown as a matter of convenience, although it will be obvious, for example, that two separate blocks having three sheaves each might be attached to the hook and also that a greater or less number of parts of the rope sustaining the load might be provided for, according to the angle at which it is desired that the load shall move with respect to the boom, as herein explained.

The two ropes d and e are wound upon the drums f and g in the same direction, and as a consequence both drums will be stationary, and the load will also be stationary whenever the equalizing-gear it, which is in operative engagement with both drums, as clearly shown inFig. 2, is held from rotation. Furthermore, if the equalizing-gear be rotated while both drums f and g are free the load will be hoisted vertically while the boom-truck is stationary on the boom. If, however, the drum g be held stationary by its brake while the equalizing-gear is operated, it will be obvious that through the engagement of the equalizinggear with both drums the drum f will be rotated at greater speed than that of the equalizing-gear, and the load will be drawn inwardly. The boom-truck under these conditions will of course run horizontally on the boom; but as the load is supported from the boom-truck by a multiple number of parts of each rope (in the present instance seven) the load will move inward and upward at an angle with the boom of one in seven. On the other hand, if the direction of the rotation of the equalizing-gear be reversed and the drum f be held from rotation, the rope 6 being then paid out by the drum g, the load will move inward and downward at an inclination of one in seven. By a suitable regulation of the direction of rotation of the equalizing-gear and the application of the brake to one or the other of the drums f and g it will be obvious that the load can also be moved outward as well as inward at an inclination of one in seven either upward or downward.

The movement of the load can thus be suited to the particular conditions of each case, and whatever such conditions may be the movement of the load is easily controlled, and as no clutch or brake is introduced between the power and the load many of the difliculties incident to the operation of the hoisting apparatus of this class will be avoided, and the possibility of accident will be reduced to a minimum.

I claim as my invention- In a hoisting apparatus, the combination of two drums loosely mounted, an equalizinggear in operative relation with both drums, means to apply power to the equalizing-gear, a boom, guide-sheaves, a boom-truck, a running-block, multiple sheaves on the boomtruck and the hook-block and ropes passed over said guide-sheaves and said multiple sheaves, substantially as shown and described. This specification signed and witnessed this 7th day of November, A. D. 1903.

CHARLES W. HUNT. In presence of ANTHONY N. J ESBERA, W. B. GREELEY. 

